| Rank | Clinic Name | Patient Rating | Country | Lead Doctor | experience | Techniques | Best For | Why It’s Ranked | Accreditations |
|---|---|---|---|---|---|---|---|---|---|
| #1 | 4.7 / 5 (496) | Barcelona, Spain | 34+ years23,000+ treatments | Open heart surgery, atrial septal defect surgery, tetralogy of Fallot surgery, Ross procedure, cardiac transplantation | Complex pediatric and congenital heart conditions | JCI-accredited clinic with surgeons performing 5,000+ cardiac operations and a 98.2% postoperative survival rate. Specialists are world-renowned for congenital heart disorder treatments. | Joint Commission International , European Foundation for Quality Management | ||
| #2 | 5.0 / 5 (3) | Madrid, Spain | — | — | Coronary angiography, Echocardiography | — | — | Joint Commission International , International Organization for Standardization | |
| #3 | 4.7 / 5 (44) | Barcelona, Spain | — | 14,000+ treatments | Extracorporeal circulation, robotic-assisted surgery | — | Performs 250 cardiac surgeries annually (most in Spain), including on premature babies from 1.5 kg. Among Europe's lowest mortality rates. CSUR and ERN certified for complex congenital heart disease. | Bookimed Award: Best pediatric hospital, World's Best Specialized Hospitals 2022 by Newsweek | |
| #4 | 4.7 / 5 (7) | Pamplona, Spain | — | — | Open heart surgery | — | — | Joint Commission International , European Society for Medical Oncology |